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hjlf
3 years ago
10

Explain what an acid,a base and an alkali are.

Chemistry
2 answers:
atroni [7]3 years ago
4 0

An acid is a chemical substance that has a sour taste and is corrosive if concentrated. It has a pH value less than 7. It turns blue litmus paper (pH indicator) red. Citric acid is a common acid found in lemon.

Alkali and base are the same thing. An Alkali is a chemical substance that has a soapy feeling and a bitter taste. It is corrosive if concentrated. It has a pH value greater than 7. It turns red litmus paper blue. Alkalis are commonly found in shampoos. The burning in eyes when such products get into eyes is caused by alkalis. Sodium hydroxide is a common alkali.

BigorU [14]3 years ago
3 0
Those are types of water on a pH scale 7.0 and above are alkili water and anything under that is acidic
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D would be correct because both elements have two valence electrons.
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7 0
2 years ago
what would be the effect on the melting point of a sample if it were not dried completely after filtering the recrystallized sam
jok3333 [9.3K]

The melting point of the sample if it is not dried completely after filtering the recrystallized product will have a broad range and will occur at lower range than the actual value.

What is melting point?

Melting point is the temperature at which the solid form of a given substance changes to the liquid form at atmospheric pressure. It is important because, by using the physical property of a substance the substance can be identified.

The sharp range melting point of the substance indicates the purity of the substance. If the sample is not dried completely after recrystallisation, the melting point will have a broad range.

Therefore, if the sample given is not dried completely, it will be impure and the decreases the melting point of the substance. So the actual melting point of the substance cannot be determined.

To learn more about the melting point click on the given link brainly.com/question/40140

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7 0
1 year ago
Generally speaking, which group would have the lowest electronegativity values in a period?
dezoksy [38]

Answer: Group 1 would have the lowest electronegativity values.

Explanation:

Electronegativity is the power of an atom in a molecule to attract electrons. It is also synonymous with the oxidizing ability or non-metallic character of elements.

Generally, across a given period from left to right, electronegativity increases due to increasing nuclear charge and decreasing atomic radius ( or atomic size ). This is because there is a greater tendency for a smaller atom with higher nuclear attraction to attract electrons than a larger atom with a lower nuclear attraction due to the shielding effect of the nuclear attraction by the inner shell electrons on the outermost electrons in the larger atom.

Also, down a particular group, electronegativity generally decreases due to increasing atomic radius/size.

This is why metals are generally electropositive ( lose electrons ) and non-metals are electronegative ( gain electrons ) as they are both found more on the left and right sides of the periodic table respectively.

3 0
3 years ago
Read 2 more answers
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